RESIDENT EVIL 5 BOOSTING 

All of the online achievements can be boosted amounting to a total of 200 points.  They are pretty self-explanatory and I would choose the map public enemy. Also I would buy Sheva (tribal costume) so that you have unlimited arrows as a weapon so you don’t run out. 4 players are required to boost these achievements. Also you can choose your host. 

MULTIPLAYER ACHIEVEMENTS

Army of One - 15 points

Win 30 matches in Slayers.

Eye of the Tiger - 15 points

Win 30 matches in Survivors.

The Team That Slays Together...- 30 points

Win 30 matches in Team Slayers.

We Will Survive - 30 points

Win 30 matches in Team Survivors.

Keep the Good Times Rolling - 15 points

Chain a 20-defeated combo in Slayers.

This is the hardest of the online achievements. 

It Takes Two to Tango - 15 points

Chain a 40-defeated combo in Team Slayers.

It's All About the Points - 15 points

Score at least 40,000 points in Survivors.

There's no "I" in Team - 15 points

Score at least 80,000 points in Team Survivors.

Let's Get This Party Started! - 20 points

Unlock all selectable characters in Versus.

Just play a lot of online to get points to buy the characters

Bringing the Pain - 30 points

Defeat 100 players using physical attacks in Versus

Kill people with the X button.  

CHECK MY ACHIEVEMENT GUIDE HERE